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Seiler, Roland (2013). Orienteering. In: Levinson, David; Pfister, Gertrud (eds.) Berkshire encyclopedia of world sport, 3rd ed. 2 (pp. 914-917). Great Barrington, MA: Berkshire Publishing Group
Mayer, Heike (2011). Local food movements. In: Fredericks, Sarah; Shen, Lei; Thompson, Shirley; Vasev, Daniel (eds.) The Encyclopedia of Sustainability (pp. 263-266). Great Barrington: Berkshire Publishing Group
